Improvement in nails for attaching sqles to boots and shoes



` w.lw|c'KERsHAM'. n `Nails for Atta-chingSoles `turBfms--ancl Shoes.`

No. 136,014.- Patented Feb.18,1s73.

AM, Pllora-LnHosmPH/ co. umso/wels mums) .UNITEIJ STATES WILLIAMWICKERSHAM, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN NAI'LSHFOR ATTACHING SOLES TO BOOTS AND, SHOES.

Specification forming part of Letters Patent No. 136,014, dated February18, 1873.

To all whom 'it may concern:

Be it known that I,W1LLIAM WIcKERsHAM, of Boston, in the county ofSuffolk and State of Massachusetts, have invented a new and usefulImprovement in the Manufacture of Wire for the Attachment of Soles toBoots Y and Shoes, of which the following is a specification:

The nature of my invention consists in a manufacture of wire in suchformand with such indentations in its sides as will not interi'ere withits ready passage into the lea-ther through two or more soles, and yetindentations` so formed as will admit of the leather when damp and in apartially plastic state to pass through them in such manner that whensaid leather becomes dry the sole will adhere firmly and strongly bymeans of said indenta tions.

Referring to my drawing, a is a longitudinal section of one'form of mywire, and b is a section of the other form, and a and b are side viewsof the two forms of my wire, all on a large scale.

As will be seen by an examination of myv drawing at a, the indentationsare angular, but the angles are so large or Wide as to make a longtaperto the sides of the wire as it passes into the leather, and the externalangle on the prominent portion of the wire (or around its .largestdiameter) is not sharp enough to out or mangle the fibers of the leatherinto saw-dust, but by reason of the smallness of the incline of thesurface of the wire toits axis it will pass 'easily and smoothly intothe leather, allowing the leather (after the wire is in) to contractonto its smaller diameter, as well as all Vother parts.

In my drawing, at b and b is shown a variation having the bottom of theindentation rounded, instead of being angular, as at a.

I am aware that others have made wires with angles; but the externalangles have been so sharp that they would cut and mangle the `bers ofthe lea-ther, thereby lling the indentations or spaces about the smallerdiameter with sawdust, and thereby giving the prominent portions butlittle hold on the leather; besides the wires as just described, and asheretofore made, having their prominent portions angular, theindentations have been so deep that the leather could not contract ontotheir smaller portionsif the sawdust was not in the way, so that thedistinctive feature of my wire, and that which makes it practicallyuseful, is having the angle so wide, and consequently having the inclineof the surface so small, thatl the prominent angular portion can passsmoothly into the leather without cutting or mangling its fibers, andthe inclination so gradual from the largest to the smallest diameter,and the indentation so slight or shallow, that the leather can readilycontract onto the smaller portion or into the bottom ofthe indentation,by which it will have a strong and firm hold on the leather after it hascontracted onto all parts of the wire, and has become rigid and hard bydrylng.

v'I do not have the inclination on one side ot' the prominent part verysteep, and on the other side very gradual; but I have them alike, or asnea-r as may be, and when bottom of the indentation is rounded, and theangle -of the prominent part is the same, the indentation will not be sodeep.

Having thus described my invention, I will state my claim to be A A wirefor attaching soles of boots and shoes, having i ndcntations andprominent por tions around it, making a succession of larger and smallerdiameters, having its larger diameters terminate in denite angles, asdescribed, and its indentations either rounded or terminate in an angle,all substantially as described, and for the purpose set forth.

' WILLIAM WIOKERSHAM. Witnesses:

A. D. PARKER,

F. s. EDMINSTER.

